Fault detection system and method for overspeed protection speed sensors
AssigneeGeneral Electric Company
InventorsMichael Glynn Wise, Fred Henry Boettner, John Robert Booth
Life of this patent
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Abstract
A fault detection system for an over-speed protection system of a rotating machine includes a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine. The system includes a first input configured to receive a first pulse train from the first speed sensor, a second input configured to receive a second pulse train from the second speed sensor, a third input configured to receive a third pulse train from the third speed sensor, and a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train.
Claims20
A fault detection system for an over-speed protection system of a rotating machine including a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine, the system comprising:
- a first input configured to receive a first pulse train from the first speed sensor;
- a second input configured to receive a second pulse train from the second speed sensor;
- a third input configured to receive a third pulse train from the third speed sensor;
- and
- a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train.
A programmable logic device programmed to perform fault detection of an over-speed protection system for a rotating machine including a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine, the device comprising:
- a first input configured to receive a first pulse train from the first speed sensor;
- a second input configured to receive a second pulse train from the second speed sensor;
- a third input configured to receive a third pulse train from the third speed sensor;
- and
- a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train.
A method, implemented by a processor, of detecting faults in an over-speed protection system of a rotating machine, the method comprising:
- determining whether a first pulse train is received from a first speed sensor sensing a first speed of a shaft of the rotating machine;
- determining whether a second pulse train is received from a second speed sensor sensing a second speed of the shaft;
- determining whether a third pulse train is received from a third speed sensor sensing a third speed of the shaft;
- and
- when a specified number of the first pulse train, the second pulse train, and the third pulse train are determined to not be received, outputting a shutdown signal based on processing the first pulse train, the second pulse train, and the third pulse train.
Dependencies are inferred from the claim text.